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Structural Packaging Design

Packaging Structures Designed Around Your Product

EPACK develops custom packaging structures around your product, fit, protection, presentation and production needs. Start with a product, existing dieline or packaging idea—we help turn it into a practical structure ready for review.

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White custom packaging prototype with internal inserts over a structural dieline.

Where to Start

Start With What You Already Have

Structural packaging does not always start with a complete technical brief. You may begin with a physical product, packaging concept, existing dieline or current package. EPACK can review what you already have and identify what is needed to move the structure forward.

Packaging designer assembling a white structural prototype beside sketches and dieline drawings.

  1. I Have a Product

    If the product already exists, its dimensions, weight, shape and intended presentation can provide the starting point. The packaging structure can then be developed around product fit, support, presentation and access.

  2. I Have a Packaging Idea

    A sketch, reference image, existing package or general packaging format can provide an initial direction. That direction can be translated into a working structure and reviewed against the product and project requirements.

  3. I Have an Existing Dieline

    An existing structure does not always need to be redesigned from the beginning. Dimensions, inserts, opening methods or construction details can be reviewed and refined where a new product, size or production requirement calls for changes.

  4. I Need an Insert or Multi-Part Structure

    Some projects require more than an outer box. Inserts, trays, compartments and other components can be developed together so the complete packaging arrangement works around the product rather than as separate parts.

Design Priorities

A Packaging Structure Has More Than One Job

Structural design is not simply about defining the outside dimensions of a box. The structure needs to work around the product, packaging format, intended presentation and practical use.

  1. Fit & Positioning

    The product should sit in the intended position without unnecessary movement or excessive unused space. Dimensions, orientation and internal support are considered together when developing the structure.

  2. Support & Protection

    The packaging should provide an appropriate level of support for the product and intended use. Depending on the project, this may involve the outer construction, inserts, spacing or component positioning.

  3. Opening & Product Access

    How the packaging opens affects both presentation and usability. Lids, sleeves, drawers, panels and other structural elements need to work around how the package will be opened and how the product will be accessed.

  4. Structural Function

    The individual parts of the packaging need to work together. Closures, inserts, trays, sleeves, compartments and other components are considered as part of one complete structure.

  5. Assembly Practicality

    A structure also needs to be practical to form and assemble. Folding, fitting, gluing and other assembly requirements are considered as the working structure is developed.

  6. Space & Structural Efficiency

    Where practical, dimensions and structural details can be refined to avoid unnecessary empty space or avoidable construction complexity while maintaining the required fit, function and presentation.

Before Design Begins

We Start With the Requirements Behind the Structure

A useful structural brief involves more than length, width and height. Before the structure is developed, relevant product, packaging and project requirements are reviewed so the design is based on how the packaging will actually be used. A finished technical brief is not required before the first discussion.

  1. Product

    Useful information may include:

    • Product dimensions
    • Product weight
    • Product shape
    • Intended orientation
    • Fragile or sensitive areas
    • Components or accessories
    • Areas that require support or clearance

  2. Packaging

    We may also review:

    • Intended packaging format
    • Opening method
    • Product presentation
    • Insert requirements
    • Number of products or components
    • Existing packaging references
    • Special structural features

  3. Intended Use

    Considerations may include:

    • Retail presentation
    • Gift or promotional packaging
    • E-commerce
    • Product sets
    • Distribution
    • Storage
    • Customer handling

  4. Project Requirements

    Other useful project information may include:

    • Existing dielines
    • Existing packaging
    • Artwork status
    • Material preference
    • Approximate order quantity
    • Sampling requirements, if known
    • Target date
    • Customer-specific requirements

Structural Design Scope

From Outer Structure to Internal Product Fit

Structural development can cover the complete packaging arrangement or one specific part of an existing design. The scope is defined around what the project actually needs rather than requiring every customer to follow the same design route.

Kraft packaging structure with internal paperboard supports holding two bottles in position.

Outer Packaging Structures

Structural development can cover a range of outer packaging formats based on the product and project requirements.

  • Rigid boxes
  • Folding cartons
  • Sleeves
  • Drawer structures
  • Presentation boxes
  • Multi-panel structures
  • Other custom paper-based packaging formats

Inserts & Product Support

Internal structures can be developed to position, separate or support products within the outer packaging.

  • Paperboard inserts
  • Corrugated inserts
  • Product trays
  • Dividers
  • Compartments
  • Multi-product arrangements
  • Other project-specific insert materials where required

Multi-Component Packaging

Multiple structural components can be developed together where the packaging requires a more complex arrangement.

  • Outer box + inner tray
  • Box + sleeve
  • Box + insert
  • Packaging + accessory compartment
  • Multi-layer arrangements
  • Multiple products within one presentation pack

Existing Structure Refinement

Existing dielines or physical packaging can be reviewed and refined where dimensions, fit or construction need to change.

  • Dimension adjustment
  • Product-fit improvement
  • Insert redevelopment
  • Component alignment
  • Opening or closing details
  • Assembly practicality
  • Structural simplification

Project Inputs & Outputs

What You Provide. What We Develop.

Every structural project is different, but a few useful starting references can help development move more efficiently. You do not need to have every item ready before contacting EPACK.

From Your Project

Helpful to Provide

Where available:

  • Product dimensions
  • Product weight
  • Product photos, drawings or a physical product
  • Preferred packaging format
  • Reference packaging or existing dieline
  • Approximate order quantity
  • Functional requirements
  • Target date

Developed for the Next Stage

Structural Development May Include

Depending on the agreed project scope:

  • Packaging format recommendation
  • Working dimensions & structural layout
  • Custom dieline
  • Insert & component configuration
  • Material & construction considerations
  • Structural revisions
  • Prototype recommendation
  • Approved structural reference

Client Project Milestones

From Project Requirement to Structural Approval

Structural design is coordinated around clear review points so the customer can understand what is being developed and when the structure is ready to move forward.

  1. Define

    Confirm the Structural Brief

    We review the product, intended packaging format, fit requirements, functional needs and relevant project information. This establishes what the structure needs to achieve.

  2. Develop

    Prepare the Working Structure

    Dimensions, construction and relevant internal components are translated into a working structural layout. Where necessary, different arrangements can be considered before a preferred direction is selected.

  3. Review

    Review the Working Structure

    The current structure is reviewed against the agreed project requirements. Where physical evaluation is needed, the design can move into prototyping so relevant fit and functional details can be checked.

  4. Approve

    Confirm the Final Structure

    Required structural adjustments are resolved before approval. The confirmed dimensions and dieline then provide the structural reference for artwork preparation, sampling and production preparation.

Designed With Production in Mind

Structural Design Connected to Manufacturing

Throughout structural development, EPACK considers how the working structure will transition into manufacturing. Because EPACK combines packaging development with manufacturing, relevant production requirements can be reviewed before the structure is finalized.

Explore EPACK Packaging R&D
CAD sample plotter testing a packaging dieline on paperboard before production.

Practical Construction

The working structure is considered in relation to how the packaging will be formed, converted and assembled. This helps identify avoidable construction issues before the structure advances to later project stages.

Production Compatibility

Material direction, structural details and relevant production requirements can be considered together rather than treating the structure as an isolated design file.

Dieline Verification

Where appropriate, the working dieline can be plotted or cut as a physical reference to check dimensions, cut and crease positions, and key structural relationships before the structure is finalized.

Kraft structural packaging prototype with a bottle fitted inside paperboard supports and separate structural components nearby.

Validate the Structure

Move From Dieline to Physical Review

Within the review stage, some structural decisions can be evaluated from drawings and dimensions, while others are easier to assess once the structure exists as a physical prototype. This is particularly useful where product fit, opening behavior, inserts or component interaction need additional review before final approval.

Where physical review is needed, a structural prototype can help evaluate:

  • Overall Dimensions
  • Product Fit
  • Insert Arrangement
  • Opening & Closing
  • Component Interaction
  • General Structural Function
Explore Samples & Prototyping See Packaging Artwork Design

Common Questions

Questions About Structural Packaging Design

Clear answers about starting information, physical products, existing structures, custom inserts, prototypes, revisions and what happens after the structure is approved.

Do I need a finished packaging design before contacting EPACK?

No. A structural project can start from different stages. You may have a physical product, product dimensions, an existing package, a reference image, an initial idea or an existing dieline.

EPACK can review the available information and identify what is still required before structural development moves forward.

Can EPACK develop a packaging structure if I only have the physical product?

Yes. A physical product can provide a useful starting reference for structural development.

Its dimensions, weight, shape, orientation and presentation requirements can be considered when defining the packaging structure. Information such as the preferred packaging style, approximate quantity and project requirements is also helpful.

Can EPACK refine an existing dieline or packaging structure?

Yes. An existing dieline or physical package can provide the starting point rather than requiring a completely new structure.

Depending on the project, development may focus on dimensions, product fit, inserts, opening details, component arrangement or other structural changes.

Can EPACK design a custom insert around my product?

Yes, where an insert forms part of the required packaging structure. The insert can be developed in relation to the product and outer packaging so the components work together as one arrangement.

Can I send a physical product for structural review?

Where physical product review is appropriate, an actual product can provide a useful reference for fit and interaction.

Project requirements and shipping arrangements should be confirmed with the EPACK team before the product is sent.

Does every structural project require a physical prototype?

Not necessarily. The appropriate review method depends on the structure, product-fit requirements and project stage.

For projects where dimensions, opening behavior, inserts or component interaction need physical evaluation, a prototype can provide a useful review step.

Can the structure be revised after the first review?

Yes. Structural development may involve adjustments before approval.

Where required, dimensions, inserts or other relevant details can be refined and reviewed again before the structure is confirmed.

What happens after the structure is approved?

The approved structure establishes the dimensions, construction and dieline for the next project stages. Depending on the project, these may include:

  • Packaging artwork preparation
  • Structural or printed sampling
  • Material and finish confirmation
  • Production preparation

Related Services

Packaging Artwork Design Samples & Prototyping

Develop Your Packaging Structure

Need a Packaging Structure Developed or Refined?

Share your product dimensions, packaging idea, existing dieline or reference packaging. EPACK can review what you already have and help identify the structural information needed to move the project toward artwork, sampling and production.

Discuss Your Packaging Structure Explore Samples & Prototyping

Helpful to Include

Share whatever is already available. A complete technical brief is not required before the first discussion.

  • Product dimensions
  • Product weight
  • Product photos or drawings
  • Physical product, if available
  • Packaging reference
  • Existing dieline
  • Approximate quantity
  • Functional requirements
  • Target date